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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>验证码</title>
</head>
<body>

<div>
    <p>方式一：获取图片</p>
    <img id="imageCode" src="http://localhost:8888/verificationCode/getImage" alt="" onclick="changeImage()">
    <p>verifyToken：查看Responses Headers</p>
</div>

<hr>

<div>
    <p>方式二：获取base64图片编码</p>
    <img src="" alt="" id="base64ImageCode" onclick="changeBase64Image()">
    <p id="verifyToken"></p>
</div>

<script type="text/javascript">
    function changeImage() {
        document.getElementById('imageCode').src = "http://localhost:8888/verificationCode/getImage?time=" + new Date().getTime();
    }

    var url = "http://localhost:8888/verificationCode/getBase64Image";

    function changeBase64Image() {
        var xmlHttp = null;
        if (window.XMLHttpRequest) {
            xmlHttp = new XMLHttpRequest();
        } else if (window.ActiveXObject) {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        xmlHttp.onreadystatechange = function () {
            if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
                var result = JSON.parse(xmlHttp.responseText);
                document.getElementById('base64ImageCode').src = result.data.image;
                document.getElementById('verifyToken').innerText = "verifyToken：" + result.data.verifyToken;
            }
        };
        xmlHttp.open("GET", url, true);
        xmlHttp.send(null);
    }

    changeBase64Image();

</script>

</body>
</html>